Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c0926d32775c8d0…

MALICIOUS

PDF

83.0 KB Created: 2021-05-18 02:11:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 606161bac58d80302b65118d71120cf9 SHA-1: 2970b249343936c4fc0f0030f46757b9d66a0e6f SHA-256: 7c0926d32775c8d0fb2ec9d5d904e395fe00c5e753a7f461b2af09a9e7ee6e83
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a deliberate attempt to create a network of links. The presence of 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' further supports its malicious nature. While no scripts were explicitly extracted, the structure and URL patterns are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://leonvi.ru/strik?utm_term=fortnite+cracked+accounts+shoppy.gg PDF link annotation
    • https://xabesokexiba.weebly.com/uploads/1/3/4/3/134327988/fejubolekozavep-nizugegezaluj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375514/normal_6034903d4d8d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412774/normal_5ff9a4a75e173.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453560/normal_606633691c452.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381973/normal_600cf4e8b0094.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455901/normal_6008806994b6b.pdfIn PDF document text
    • http://turiwovezaz.iblogger.org/clinical_pharmacology_of_anticancer_drugs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529977/normal_60209bb1643ce.pdfIn PDF document text
    • https://fizokufewof.weebly.com/uploads/1/3/4/0/134096090/xogugenij-fafos-gunatomufe.pdfIn PDF document text
    • https://sonikegusu.weebly.com/uploads/1/3/3/9/133997348/6cbe70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376088/normal_602dff85b3bf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391920/normal_5fd79dbc12d58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474977/normal_5fdace61b8b54.pdfIn PDF document text
    • https://tekeginisexufu.weebly.com/uploads/1/3/1/3/131381150/rivida.pdfIn PDF document text
    • https://melenoradu.weebly.com/uploads/1/3/4/3/134340649/4179179.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378827/normal_6037e59599ac2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403938/normal_6053b96d8fef7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413374/normal_5fefb46367a29.pdfIn PDF document text
    • https://shoppy.gg/@mr1.7In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/oculus_rift_s_data_sheet.pdfIn PDF document text
    • http://zexikewilupime.rf.gd/business_intelligence_report.pdfIn PDF document text
    • http://zasupodoni.rf.gd/kepanazajewe.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/power_smart_db7651.pdfIn PDF document text
    • http://zotuxegusam.epizy.com/symbicort_budesonide_formoterol_adalah.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA0 5456 bytes
SHA-256: 2b04410eb7a43ffc7b0c9a557127c381e87f61ebe4edeaf41427e7a6cd586a45
font_01_sfnt_off0001103d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1103D 13896 bytes
SHA-256: 5006a7d512ee331f6f2af9b7e4608bb578961bff479ea6fe8f298c73fcc7652e